# days = ["星期","星期二","星期三","星期四","星期五","星期六","星期日"]
# # input()输入 收到的都是字符串
# inputA = input()
# inputInt = int(inputA)
# print(days[inputInt-1])
formatted_num = "{:.2f}".format(2/3)
print(2/3)
print(formatted_num)